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3 years ago

CAN SOMEONE PLEASE HELP ME

Physics

2 answers:

VLD [36.1K]3 years ago

7 0

Answer:

she will eventually slow down and come to a stop

lakkis [162]3 years ago

7 0

2: she will eventually slow down and come to a stop

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The earth's magnetic moment is 8 x 1022 a-m2. If that moment were created by a loop of wire going around the earth (r = 6378 km)

Elena L [17]

Answer:

M = I A definition of magnetic moment - current * area

A = π R^2 = π * (6.4E6)^2 = 1.3E14 m^2

I = 8E22 A-m^2 / 1.3E14 m^2 = 6.2E8 amperes

I = 620,000,000 amps

4 0

2 years ago

A U-shaped tube open to the air at both ends contains water. A quantity of oil of unknown density is slowly poured into the righ

nadezda [96]

Answer:

$\rho_o=600\ kg.m^{-3}$ is the density of the oil

Explanation:

Given:

height of oil column, $h_o=20\ cm$

oil column height that is more than the water column height in the other arm, $\delta h=8\ cm$

<u>Now from the given it is clear that the height of water column is:</u>

$h_w=h_o-\delta h$

$h_w=20-8$

$h_w=12\ cm$

Now according to the pressure balance condition of fluid columns:

Pressure due to water column = Pressure due to oil column

$P_w=P_o$

$\rho_w.g.h_w=\rho_o.g.h_o$

$1000\times 9.8\times 0.12=\rho_o\times 9.8\times 0.2$

$\rho_o=600\ kg.m^{-3}$ is the density of the oil

8 0

4 years ago

Read 2 more answers

As a cold air mass advances on a warm air mass, what usually comes before it?

Marina CMI [18]

Answer: A cold front occurs when a cold air mass advances into a region occupied by a warm air mass. If the boundary between the cold and warm air masses doesn't move, it is called a stationary front.

Explanation: Two types of occluded front exist: the warm-type and the cold-type. They’re distinguished by the relative temperatures of the air mass ahead of the occlusion – in other words, the air mass ahead of the original warm front – and the air mass behind the cold front. If the air behind the cold front is colder than the air ahead of the occlusion, it shoves beneath that air (because it’s denser) to form a cold-type occluded front. If the air behind the cold front is warmer than the air ahead, it rides over it to form a warm-type occluded front – which appears to be the more common case. In either situation, the lighter warm air representing the air mass originally between the warm and cold fronts sits above the boundary between the two cooler air masses.

Hope this helps!!

8 0

3 years ago

a plane flies from Addis Ababa to Gamble is 400km. in 2 hrs, then straight back to Gamma is 200km. in 1hrs what is the average s

kramer

Answer:

a) Average speed = 200 Km/hr

b) Average velocity = 0 m/s

c) Total distance = 800 Km

d) Total displacement = 0 Km

Explanation:

a) Let the speed of the plane from Addis Ababa to Gamble be represented by $S_{1}$ , and from Gamble to Addis Ababa by $S_{2}$ .